有以下程序 #include main() { int a[4][4]={{1,4,3,2}, {8,6,5,7}, {3,7,2,5}, {4,8,6,1}}; int i, j, k, t; for (i=0; i<4; i++) for (j=0; j<3; j++) for (k=j+1; k<4; k++) if (a[j][i] > a[k][i]) { t=a[j][i]; a[j][i] = a[k][i]; a[k][i] = t; } /* 按列排序 */ for (i=0; i<4; i++) printf("%d, ",a[i][i]); } 程序运行后的输出结果是